<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>用户注册</title>
  <link rel="stylesheet" href="css/common.css">
  <link rel="stylesheet" href="css/login.css">
</head>
<body>
<!-- 导航栏 -->
<div class="nav">
  Chit-chat
</div>
<!-- 主窗口区 -->
<div class="login-container">
  <div class="login-dialog">
    <h3>注册</h3>
    <div class="row">
      <span>用户名</span>
      <input type="text" id="username">
    </div>
    <div class="row">
      <span>密码</span>
      <input type="password" id="password">
    </div>
    <div class="row">
      <button id="submit" onclick="register()">注册</button>
    </div>
  </div>
</div>

<!-- 引入 jquery -->
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<!-- 实现前后端交互 -->
<script>
  function register(){
    if($("#username").val() == "" || $("#password").val() == ""){
      alert("用户名、密码不能为空!");
      return ;
    }
    $.ajax({
      type:"post",
      url: "/user/register",
      data: {
        username: $("#username").val(),
        password: $("#password").val()
      },
      success: function (result){
        if(result==0){
          alert("用户名后密码不能为空!");
        }
        if(result == 1){
          alert("注册成功!");
          location.href = "login.html";
        }
        if(result == 2){
          alert("用户名已存在");
        }
      }
    });
  }

</script>
</body>
</html>